mirror of
https://review.coreboot.org/flashrom.git
synced 2025-04-28 23:43:42 +02:00
39446e34c8
AMD SB700 and later have an integrated microcontroller (IMC) which runs from shared flash. The IMC will happily issue reads while we write, issue writes while we read, and generally cause lots of havoc due to the concurrent accesses it performs while flashrom is running. A failing or corrupted read can be detected since r1145, and the worst case is that the read aborts and the user has to retry. A failing write is much more serious. It can be detected since r1145, but if the SPI interface locks up, we can't continue writing nor can we read the current chip contents. If the IMC is inactive, there is no reason to worry. If the IMC is active, flashrom will refuse to erase/write the chip with this patch. The correct fix would be to stop the IMC during flashing, but apparently the relevant registers are undocumented, so we take the safe route for now until someone from AMD can give us more info. Corresponding to flashrom svn r1173. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Tested-by: Matthias Kretz <kretz@kde.org> Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
------------------------------------------------------------------------------- flashrom README ------------------------------------------------------------------------------- flashrom is a utility for detecting, reading, writing, verifying and erasing flash chips. It is often used to flash BIOS/EFI/coreboot/firmware images in-system using a supported mainboard, but it also supports flashing of network cards (NICs), SATA controller cards, and other external devices which can program flash chips. It supports a wide range of DIP32, PLCC32, DIP8, SO8/SOIC8, TSOP32, and TSOP40 chips, which use various protocols such as LPC, FWH, parallel flash, or SPI. Do not use flashrom on laptops! The embedded controller (EC) present in many laptops interacts badly with any flash attempts and can brick your laptop permanently. Please make a backup of your flash chip before writing to it. Please see the flashrom(8) manpage. Packaging --------- To package flashrom and remove dependencies on subversion, either use make export or make tarball make export will export all flashrom files from the subversion repository at revision BASE into a directory named $EXPORTDIR/flashrom-$VERSION-r$SVNREVISION and will additionally modify the Makefile in that directory to contain the svn revision of the exported tree. make tarball will simply tar up the result of make export and gzip compress it. The snapshot tarballs are the result of make tarball and require no further processing. Build Instructions ------------------ To build flashrom you need to install the following packages or ports: Linux et al: * pciutils / libpci * pciutils-devel / pciutils-dev / libpci-dev * zlib-devel / zlib1g-dev (needed if libpci was compiled with libz support) On FreeBSD, you need the following ports: * devel/gmake * devel/libpci On OpenBSD, you need the following ports: * devel/gmake * sysutils/pciutils To compile on Linux, use: make To compile on FreeBSD, use: gmake To compile on Nexenta, use: make To compile on Solaris, use: gmake LDFLAGS="-L$pathtolibpci" CC="gcc -I$pathtopciheaders" CFLAGS=-O2 To compile on NetBSD or DragonFly BSD, use: ln -s /usr/pkg/include/pciutils pci gmake CPPFLAGS=-I. LDFLAGS="-L/usr/pkg/lib -Wl,-rpath-link,/usr/pkg/lib" To compile on OpenBSD, use: gmake To compile and run on Darwin/Mac OS X: Install DirectIO from coresystems GmbH. DirectIO is available at http://www.coresystems.de/en/directio. To cross-compile on Linux for DOS: Get RPMs of the cross compiler from the DJGPP site and install them: djcross-binutils-2.19.1-10ap.i386.rpm djcross-gcc-tools-4.4.1-1ap.i686.rpm djcross-gcc-4.3.2-8ap.i686.rpm Download pciutils 3.1.5 and apply http://assembler.cz/flashrom/pciutils.patch Download and compile http://assembler.cz/flashrom/libgetopt/ Compile pciutils, see README.DJGPP for instructions. Enter the flashrom directory. ../libpci should contain pciutils source and binaries. ../libgetopt should contain getopt.a from libgetopt. Run either (change settings where appropriate) make CC=i586-pc-msdosdjgpp-gcc STRIP=i586-pc-msdosdjgpp-strip OS_ARCH=DOS or (above settings hardcoded) make djgpp-dos You might have to add WARNERROR=no to the make command line. To run flashrom.exe, download http://clio.rice.edu/djgpp/csdpmi7b.zip and make sure CWSDPMI.EXE is in the current directory. Installation ------------ In order to install flashrom and the manpage into /usr/local, type: make install For installation in a different directory use DESTDIR, e.g. like this: make DESTDIR=/usr install If you have insufficient permissions for the destination directory, use sudo by adding sudo in front of the commands above. Contact ------- The official flashrom website is: http://www.flashrom.org/ The IRC channel is #flashrom at irc.freenode.net The mailing list address is flashrom@flashrom.org